Cannot select Object in 3D View
See the icon that looks like an arrow next to the eye on the outliner? 



If that icon is ghosted the object cannot be selected. Click on the icon to enable it

These icons are switches:

The Eye icon is to toggle object visibility on the 3D viewport.

The Arrow Icon toggles selectability.

The Camera Icon toggles rendering.

Please take a moment to read more on the Blender Manual

https://docs.blender.org/manual/en/dev/editors/outliner.html?highlight=object%20level#toggling-object-level-restrictions